IDT7280
IDT7281
IDT7282
IDT7283
IDT7284
IDT7285
CMOS DUAL ASYNCHRONOUS FIFO
DUAL 256 x 9, DUAL 512 x 9,
DUAL 1,024 x 9, DUAL 2,048 x 9,
DUAL 4,096 x 9, DUAL 8,192 x 9
FEATURES:
DESCRIPTION:
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The IDT7280 is equivalent to two IDT7200 256 x 9 FIFOs
The IDT7281 is equivalent to two IDT7201 512 x 9 FIFOs
The IDT7282 is equivalent to two IDT7202 1,024 x 9 FIFOs
The IDT7283 is equivalent to two IDT7203 2,048 x 9 FIFOs
The IDT7284 is equivalent to two IDT7204 4,096 x 9 FIFOs
The IDT7285 is equivalent to two IDT7205 8,192 x 9 FIFOs
Low power consumption
The IDT7280/7281/7282/7283/7284/7285 are dual-FIFO memories that
loadandemptydataonafirst-in/first-outbasis.Thesedevicesarefunctional
andcompatibletotwoIDT7200/7201/7202/7203/7204/7205FIFOsinasingle
packagewithallassociatedcontrol,data,andflaglinesassignedtoseparate
pins. The devices use Full and Empty flags to prevent data overflow and
underflowandexpansionlogictoallowforunlimitedexpansioncapabilityinboth
word size and depth.
— Active: 685 mW (max.)
— Power-down: 83 mW (max.)
Ultra high speed—12 ns access time
Asynchronous and simultaneous read and write
Offers optimal combination of data capacity, small foot print
and functional flexibility
Ideal for bi-directional, width expansion, depth expansion,
bus-matching, and data sorting applications
Status Flags: Empty, Half-Full, Full
Thereadsandwritesareinternallysequentialthroughtheuseofringpointers,
withnoaddressinformationrequiredtoloadandunloaddata.Dataistoggled
inandoutofthedevices throughtheuseoftheWrite(W)andRead(R)pins.
Thedevicesutilizea9-bitwidedataarraytoallowforcontrolandparitybits
attheuser’soption.Thisfeatureis especiallyusefulindatacommunications
applicationswhereitisnecessarytouseaparitybitfortransmission/reception
errorchecking.ItalsofeaturesaRetransmit(RT)capabilitythatallowsforreset
of the read pointer to its initial position when RT is pulsed LOW to allow for
retransmissionfromthebeginningofdata.AHalf-FullFlagisavailableinthe
singledevicemodeandwidthexpansionmodes.
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Auto-retransmit capability
High-performance CMOS technology
Space-saving TSSOP
These FIFOs are fabricated using IDT’s high-speed CMOS technology.
Theyaredesignedforthoseapplicationsrequiringasynchronousandsimul-
taneousread/writesinmultiprocessingandratebufferapplications.
Industrial temperature range (–40
Green parts available, see ordering information
°C to +85°C) is available
FUNCTIONAL BLOCK DIAGRAM
DATA INPUTS
DATA INPUTS
(DA0-DA8)
(DB0-DB8)
RSA
RSB
WB
WRITE
CONTROL
WRITE
CONTROL
RAM
RAM
WA
ARRAY A
256 x 9
ARRAY B
256 x 9
512 x 9
512 x 9
1,024 x 9
2,048 x 9
4,096 x 9
8,192 x 9
1,024 x 9
2,048 x 9
4,096 x 9
8,192 x 9
WRITE
POINTER
WRITE
POINTER
READ
POINTER
READ
POINTER
THREE-
STATE
BUFFERS
THREE-
STATE
BUFFERS
READ
CONTROL
READ
CONTROL
RA
RESET
LOGIC
RESET
LOGIC
FLAG
LOGIC
FLAG
LOGIC
EXPANSION
LOGIC
EXPANSION
LOGIC
XIA
FFA EFA
RB
XIB
XOA/HFA
FLA/RTA
FFB EFB
FLB/RTB
DATA
OUTPUTS
(QA0-QA8)
XOB/HFB
DATA
OUTPUTS
(QB0-QB8)
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IDTandtheIDTlogoaretrademarksofIntegratedDeviceTechnology,Inc
COMMERCIALANDINDUSTRIALTEMPERATURERANGES
JULY 2006
1
2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
DSC-3208/7